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  <title>Document</title>
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  <script>
    const p = new Promise(function(resolve,reject){
      setTimeout(() => {
        const num = parseInt(Math.random()*50)
        if(num <= 10){
          resolve(num)
        }else{
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        }
      }, 1000);
    })

    p.then(
      function(data){
        console.log('这个数字小于等于10 为:' + data)
      },
      function(data){
        console.log('这个数字大于等于10 为:' + data)
      }
    )
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